Jacquinot stop

{
  "id": "MLC-T-CHM-006275",
  "term": "Jacquinot stop",
  "field": "Chemistry",
  "definition": "An optical aperture placed at an intermediate focal plane within a spectrometer, designed to maximize the light throughput without compromising spectral resolution. It is typically a circular opening that defines the solid angle of radiation accepted by the instrument. This stop is particularly relevant in Fourier transform infrared (FTIR) spectroscopy to achieve high signal-to-noise ratios.",
  "synonyms": [
    "J-stop"
  ],
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 752 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/jacquinot-stop/"
}